MLX71122_16 Datasheet, PDF (42/59 Pages) Melexis Microelectronic Systems – 300 to 930MHz FSK/FM/ASK Receiver

MLX71122
300 to 930MHz FSK/FM/ASK Receiver
Datasheet
4.1.2. Control Word R1
Name
CPCUR
PFDPOL
LDERR
LDTIME
RSSIGAIN
VCORANGE
VCOCUR
VCOBUF
PRESCUR
SHOWLD
Bits
[1:0]
[2]
[3]
[5:4]
[6]
[7]
[8]
[9]
[10]
[11]
Description
charge pump current setting
00 ^100µA
01 400µA
10 _{400µA static down}
11 _{400µA static up}
PFD output polarity
0 negative
1 _positive
lock detector time error
0 15ns
1 _30ns
lock detection time
00 ^2/fR
01 4/f_R
10 _8/fR
11 _16/fR
minimum time span before lock in
fR is the reference oscillator frequency fRO divided by R, see section 4.1.5 (R4)
sensitivity of RSSI voltage
0 low gain
1 _{high gain}
(~39mV/dB)
(~51mV/dB)
VCO range
0 3V supply
1 _{5V supply}
VCO range setting for different VCCs.
VCO core current
0 450µA
1 520µA
VCO buffer current
0 900µA
1 1040µA
prescaler 32/33 reference current
0 20µA
1 30µA
30µA may be used for fRF = 868/915MHz
function of LDRSSIL bit
0 RSSIL (RSSI low flag)
1 LD (lock detection flag)
select output data of LDRSSIL, see section 4.1.8 (R7)
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REVISION 014 – AUGUST, 2016
390 10 71122 01
Page 42 of 59